Add 4/21 and 3/27
4/21 + 3/27 is 19/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
4/21 = 4 × 9/21 × 9 = 36/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
3/27 = 3 × 7/27 × 7 = 21/189 - Add the two like fractions:
36/189 + 21/189 = 36 + 21/189 = 57/189 - 57/189 simplified gives 19/63
- So, 4/21 + 3/27 = 19/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+3/27 4/21+6/27 4/42+3/27 4/21+3/54 12/21+3/27 4/21+9/27 4/63+3/27 4/21+3/81 20/21+3/27 4/21+15/27 28/21+3/27 4/21+21/27